=24.= The following proportions and cost of materials and amount
of labor required to lay 1 perch of rubble masonry are reasonably
accurate, and will serve to give an idea of how to estimate such work.
A perch of rubble masonry requires, approximately, 2,500 pounds of
stone.
COST OF RUBBLE MASONRY
_Using 1-to-3 Lime Mortar_
1 perch of stone (25 cubic ft.) delivered at work $1.25
1 bushel of lime .25
⅙ cubic yard of sand, at $1.50 per cubic yard .25
½ day, mason’s labor, at $3.20 per day 1.60
¼ day, helper’s labor, at $2 per day .50
-----
Total $3.85
_Using 1-to-3 Portland-Cement Mortar_
1 perch of stone $1.25
¾ barrel of Portland cement, at $2 per barrel 1.50
¼ cubic yard of sand, at $1.50 per cubic yard .38
½ day, mason’s labor, at $3.20 per day 1.60
¼ day, helper’s labor, at $2 per day .50
-----
Total $5.23
To the preceding amounts should be added the cost of scaffolding and
the builder’s profit. If the walls are over two stories in height, 60
cents per perch extra for hoisting should be added.